For questions 4-5 assume cytoplasmic male sterility without genetic fertility restoration. What will be the pollen...
For questions 4-5 assume cytoplasmic male sterility without genetic fertility restoration. What will be the pollen producing phenotype(s) of the progeny from the following crosses?
Female parent Male parent Phenotype of the progeny
4. male sterile X male fertile
5. male fertile X male sterile
Homework Answers
4. Female parent (male sterile) is crossed with male parent (male fertile) will produce progeny with male sterility due to cytoplasmic male sterility in female plant. As the cytoplasm is mainly derived from egg which is produced by male sterile female parent (maternal inheritance).
5. Female parent (male fertile) is crossed with male parent (male sterile) will produce progeny with male fertility due to maternal inheritance. As the plants are assumed to be cytoplasmic male sterile, the fertility of the progeny depends on cytoplasm of egg.
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For questions 4-5 assume cytoplasmic male sterility without
genetic fertility restoration. What will be the pollen...
Cytoplasmic male sterility is a useful tool in plant genetics because it can eliminate selfing without...
Cytoplasmic male sterility is a useful tool in plant genetics because it can eliminate selfing without the need to physically remove the pollen. A corn breeder is working with multiple lines which she wants to cross to produce optimal yield. She finds one plant of the true breeding line Starlight has arisen that lacks pollen production (i.e., is male sterile). She then crosses this line with Jubilee, another true breeding line using the ovules of Starlight and pollen of Jubilee....
Genetic Linkage The six genes listed below are all located on Chromosome 2 of Drosophila melanogaster....
Genetic Linkage The six genes listed below are all located on Chromosome 2 of Drosophila melanogaster. Your goal is to construct a genetic map of Chromosome 2. That is, determine the order of these genes along chromosome 2 and the map distance in centimorgans between each gene. To complete this task, you will be given the results of a variety of two-point test crosses involving these genes. For each test cross you may assume that the female is heterozygous and...
1. What would be the phenotype for each of the following birds, including their gender? Color...
1. What would be the phenotype for each of the following birds, including their gender? Color Gender Bb ZZi: - bb ZiZi: - BB ZZ: - bb ZW: - Bb ZiW: - 2. Using the phenotypes of the parents and of the progeny given in table 1, determine the genotype of each parent in the first nest. Male Female 3. Using the phenotypes of the parents and of the progeny given in table 2, determine the genotype of each parent...
1. People wit h the sex-linked genetic disease, hemophilia, suffer from excessive bleeding because their blood...
1. People wit h the sex-linked genetic disease, hemophilia, suffer from excessive bleeding because their blood will not clot. Tom, Mary, and their 4 daughters do not exhibit symptoms of hemophilia. However, their son exhibits symptoms of hemophilia because: A) Tom is heterozygous B) Tom is homozygous C Mary is homozygous D) Mary is heterozygous E All of the above are equally likely What is the risk of having a child affected by disease with an autosomal recessive inheritance both...
A plant species X with n=5 chromosomes was crossed with a related species Y with n = 7 chromosomes. The F1 hybrids produced only a few pollen grains, which were used to fertilize the ovules of related...
A plant species X with n=5 chromosomes was crossed with a related species Y with n = 7 chromosomes. The F1 hybrids produced only a few pollen grains, which were used to fertilize the ovules of related species Z with n=7 chromosomes. A few plants were produced from this cross, and all had 19 chromosomes. The F1 hybrids (with 19 chromosomes) were mated with related species W with n=11 chromosomes. A few plants were produced from the cross and all...
Maternal effect genes are a special class of genes that have their effect in the reproductive...
Maternal effect genes are a special class of genes that have their effect in the reproductive organs of the mutant. They are interesting because the mutant organism may appear phenotypically normal, and it is the progeny that express detectable differences, and they do so whether the progeny have inherited the mutant gene or not. The first maternal effect gene identified was the gene controlling shell coiling in the water snail Lymnaea peregra. Alleles of this maternal effect gene are non-lethal...
Name Sex-linked traits are genetic char segments of DNA found on chromosomes that Sex-Linked Traits Senetic...
Name Sex-linked traits are genetic char segments of DNA found on chromosomes that Sex-Linked Traits Senetic characteristics determined by genes located on sex chromosomes. Genies are and on chromosomes that carry information for protein production and that are sponsible for the inheritance of specific traits Genes exist in alternative forms called alleics. or a trail is inherited from each parent Like traits originating from genes on autosomes (non-se chromosomes), sex-linked to omosomes), sex-linked traits are passed from parents to offspring...
The results for the F2 progeny are shown for a F1 cross using the two X-linked...
The results for the F2 progeny are shown for a F1 cross using
the two X-linked markers:
w+ and m+.
As shown in the figure, the F1 cross is between the following
two parents:
- a phenotypically wild-type (red eye, full wing), heterozygous
female: w+m+/wm
- a double mutant male (white eye, miniature wing):
wm/Y
Answer the following questions:
1) In the F1 cross, can you infer the genotype for the phenotype
in the female? Why or why not?
2)...
U IS MOST COMMOT a population as a Select from the terms below to answer questions...
U IS MOST COMMOT a population as a Select from the terms below to answer questions #17-22. One term is not used. R) Genomic imprinting S) Methylation T) Sex-influenced inheritance U) Maternal inheritance V) Sex-limited inheritance W) Complementation X) X-linked inheritance 17) Pattern baldness is controlled by two alleles: B, b. Females are bald if they are homozygous (BB) but males only need one allele B to be bald. This trait is an example of 18) A mother passes on...
questions 25,62,54,77 25. At the end of Meiosis I, which best describes the chromosomes in the...
questions 25,62,54,77
25. At the end of Meiosis I, which best describes the chromosomes in the cells? A) DNA replication in the S phase has led to a doubling in chromosome number. B) The cells contain the haploid number of chromosomes. C) Chromosome number and structure are identical to the beginning of the S phase. D) The cells contain the diploid number of chromosomes. E)The chromosome number remains the same,but the DNA content is half the original cel. g påtterns...
Genetic Linkage The six genes listed below are all located on Chromosome 2 of Drosophila melanogaster. Your goal is to construct a genetic map of Chromosome 2. That is, determine the order of these genes along chromosome 2 and the map distance in centimorgans between each gene. To complete this task, you will be given the results of a variety of two-point test crosses involving these genes. For each test cross you may assume that the female is heterozygous and...
1. People wit h the sex-linked genetic disease, hemophilia, suffer from excessive bleeding because their blood will not clot. Tom, Mary, and their 4 daughters do not exhibit symptoms of hemophilia. However, their son exhibits symptoms of hemophilia because: A) Tom is heterozygous B) Tom is homozygous C Mary is homozygous D) Mary is heterozygous E All of the above are equally likely What is the risk of having a child affected by disease with an autosomal recessive inheritance both...
Name Sex-linked traits are genetic char segments of DNA found on chromosomes that Sex-Linked Traits Senetic characteristics determined by genes located on sex chromosomes. Genies are and on chromosomes that carry information for protein production and that are sponsible for the inheritance of specific traits Genes exist in alternative forms called alleics. or a trail is inherited from each parent Like traits originating from genes on autosomes (non-se chromosomes), sex-linked to omosomes), sex-linked traits are passed from parents to offspring...
The results for the F2 progeny are shown for a F1 cross using
the two X-linked markers:
w+ and m+.
As shown in the figure, the F1 cross is between the following
two parents:
- a phenotypically wild-type (red eye, full wing), heterozygous
female: w+m+/wm
- a double mutant male (white eye, miniature wing):
wm/Y
Answer the following questions:
1) In the F1 cross, can you infer the genotype for the phenotype
in the female? Why or why not?
2)...
U IS MOST COMMOT a population as a Select from the terms below to answer questions #17-22. One term is not used. R) Genomic imprinting S) Methylation T) Sex-influenced inheritance U) Maternal inheritance V) Sex-limited inheritance W) Complementation X) X-linked inheritance 17) Pattern baldness is controlled by two alleles: B, b. Females are bald if they are homozygous (BB) but males only need one allele B to be bald. This trait is an example of 18) A mother passes on...
questions 25,62,54,77
25. At the end of Meiosis I, which best describes the chromosomes in the cells? A) DNA replication in the S phase has led to a doubling in chromosome number. B) The cells contain the haploid number of chromosomes. C) Chromosome number and structure are identical to the beginning of the S phase. D) The cells contain the diploid number of chromosomes. E)The chromosome number remains the same,but the DNA content is half the original cel. g påtterns...
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